.bk-list .list-item {
    position: relative;
    height: 9.375rem;
    border-bottom: .0625rem solid #ddd;
}

.bk-list .list-item .item-lk {
    display: block;
    height: 100%;
}

.bk-list .list-item .bk-pic {
    position: absolute;
    top: 0;
    left: 0;
    height: 9.375rem;
    padding: .625rem;
}

.bk-list .list-item .bk-info {
    height: 100%;
    margin-left: 7.375rem;
    color: #424242;
}

.bk-list .list-item .bk-info h2,
.bk-list .list-item .bk-info p {
    margin-top: 1rem;
}

.bk-list .list-item .bk-info .intro {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: #999;
}

.s-top-but {
    display: none;
    position: fixed;
    bottom: 25px;
    right: 25px;
    width: 60px;
    height: 60px;
    background: url(../img/rocket.png) no-repeat 0 0/100% 100%;
    border-radius: 50%;
    opacity: .6;
}

.s-top-but:hover {
    opacity: 1;
}